【作者】 李晓滨； 丁桦； 唐正友； 丁学勇；

【Author】 LI Xiao-bin,DING Hua,TANG Zheng-you,DING Xue-yong (School of Materials & Metallurgy,Northeastern University,Shenyang 110819,Liaoning)

【机构】 东北大学材料与冶金学院；

【摘要】 利用有限元法建立了结晶器内轴承钢矩形坯温度场数学模型,研究了是否修正角部气隙条件下轴承钢矩形坯的温度场和坯壳厚度。模拟结果表明:角部气隙只对角部区域的温度有影响,而对芯部、宽面中心、窄面中心等区域基本没有影响;修正角部气隙时,第二阶段角部温度从614℃→738℃;在第三阶段,角部温度从346℃→621℃;在距离角部20mm～60mm处出现热节区;在结晶器出口,修正角部气隙时,宽面热节区坯壳厚度由30mm→22.8mm;窄面热节区坯壳厚度由27.4 mm→20.4mm;角部(对角线)坯壳厚度由64.5mm→59mm。更多还原

【Abstract】 A mathematical model of temperature contour for GCr15 rectangular bloom in the mold was established using FEM,and studied the temperature contour and shell thickness of rectangular bloom with or without air gap were studied.The simulation results show that the corner air gap only affects the temperature of the corner region,while the core,wide face center,narrow face center regions are not affected.With the corner air gap,the corner temperature in the second phase is from 614℃to 738℃,and from 346℃to 621℃in the third stage.The hot spot area appeared at 20mm～60mm away from the corner,and the shell thickness of wide face hot spot area with air gap is from 30mm to 22.8mm,and from 27.4mm to 20.4mm in the narrow face hot spot area,and from 64.5mm to 59mm in the corner.更多还原